A novel screw design for injection molding is fairly described as "revolutionary" because it turns conventional plasticaiton theory on its.head. Decades-old single-screw theory holds that melting should be accomplished almost entirely by shear heating from mechanical work (friction) imparted by the sciew. According to this theory, barrel heaters are used only to prevent heat loss to the environment. But the new T-Rex screw assembly, designed by Spiral Logic
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